libev/ev%2B%2B.h

/*
 * libev simple C++ wrapper classes
 *
 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modifica-
 * tion, are permitted provided that the following conditions are met:
 * 
 *   1.  Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 * 
 *   2.  Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Alternatively, the contents of this file may be used under the terms of
 * the GNU General Public License ("GPL") version 2 or any later version,
 * in which case the provisions of the GPL are applicable instead of
 * the above. If you wish to allow the use of your version of this file
 * only under the terms of the GPL and not to allow others to use your
 * version of this file under the BSD license, indicate your decision
 * by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL. If you do not delete the
 * provisions above, a recipient may use your version of this file under
 * either the BSD or the GPL.
 */

#ifndef EVPP_H__
#define EVPP_H__

#ifdef EV_H
# include EV_H
#else
# include "ev.h"
#endif

#ifndef EV_CXX_EXCEPTIONS
#define EV_CXX_EXCEPTIONS 1
#endif

#undef EV_THROW
#if EV_CXX_EXCEPTIONS
#  include <stdexcept>
#  define EV_THROW(exception) throw (exception)
#else
#  define EV_THROW(exception)
#endif

namespace ev {

  typedef ev_tstamp tstamp;

  enum {
    UNDEF    = EV_UNDEF,
    NONE     = EV_NONE,
    READ     = EV_READ,
    WRITE    = EV_WRITE,
    TIMEOUT  = EV_TIMEOUT,
    PERIODIC = EV_PERIODIC,
    SIGNAL   = EV_SIGNAL,
    CHILD    = EV_CHILD,
    STAT     = EV_STAT,
    IDLE     = EV_IDLE,
    CHECK    = EV_CHECK,
    PREPARE  = EV_PREPARE,
    FORK     = EV_FORK,
    EMBED    = EV_EMBED,
    ERROR    = EV_ERROR,
  };

  enum
  {
    AUTO = EVFLAG_AUTO,
    NOENV = EVFLAG_NOENV,
    FORKCHECK = EVFLAG_FORKCHECK,
    SELECT = EVBACKEND_SELECT,
    POLL = EVBACKEND_POLL,
    EPOLL = EVBACKEND_EPOLL,
    KQUEUE = EVBACKEND_KQUEUE,
    DEVPOLL = EVBACKEND_DEVPOLL,
    PORT = EVBACKEND_PORT
  };

  enum
  {
    NONBLOCK = EVLOOP_NONBLOCK,
    ONESHOT = EVLOOP_ONESHOT
  };

  enum how_t
  {
    ONE = EVUNLOOP_ONE,
    ALL = EVUNLOOP_ALL
  };

#if EV_CXX_EXCEPTIONS
  struct bad_loop : std::runtime_error
  {
    bad_loop ()
    : std::runtime_error ("loop can't be initialized")
    {
    }
  };
#endif

#ifdef EV_AX
#  undef EV_AX
#endif

#ifdef EV_AX_
#  undef EV_AX_
#endif

#if EV_MULTIPLICITY
#  define EV_AX  raw_loop
#  define EV_AX_ raw_loop,
#else
#  define EV_AX
#  define EV_AX_
#endif

  struct loop_ref
  {

    loop_ref (EV_P)
#if EV_MULTIPLICITY
      EV_THROW (bad_loop) : EV_AX (EV_A)
#endif
    {
#if EV_MULTIPLICIY && EV_CXX_EXCEPTIONS
      if (!EV_A)
        throw bad_loop ();
#endif
    }

    bool operator== (const loop_ref &other) const throw ()
    {
#if EV_MULTIPLICITY
      return this->EV_AX == other.EV_AX;
#else
      return true;
#endif
    }

    bool operator!= (const loop_ref &other) const throw ()
    {
#if EV_MULTIPLICITY
      return ! (*this == other);
#else
      return false;
#endif
    }

#if EV_MULTIPLICITY
    bool operator== (struct ev_loop *other) const throw ()
    {
      return this->EV_AX == other;
    }

    bool operator!= (struct ev_loop *other) const throw ()
    {
      return ! (*this == other);
    }

    bool operator== (const struct ev_loop *other) const throw ()
    {
      return this->EV_AX == other;
    }

    bool operator!= (const struct ev_loop *other) const throw ()
    {
      return (*this == other);
    }

    operator struct ev_loop * () const throw ()
    {
      return EV_AX;
    }

    operator const struct ev_loop * () const throw ()
    {
      return EV_AX;
    }

    bool is_default () const throw ()
    {
      return EV_AX == ev_default_loop (0);
    }
#endif

    void loop (int flags = 0)
    {
      ev_loop (EV_AX_ flags);
    }

    void unloop (how_t how = ONE) throw ()
    {
      ev_unloop (EV_AX_ how);
    }

    void post_fork () throw ()
    {
#if EV_MULTIPLICITY
      ev_loop_fork (EV_AX);
#else
      ev_default_fork ();
#endif
    }

    unsigned int count () const throw ()
    {
      return ev_loop_count (EV_AX);
    }

    unsigned int backend () const throw ()
    {
      return ev_backend (EV_AX);
    }

    tstamp now () const throw ()
    {
      return ev_now (EV_AX);
    }

    void ref () throw ()
    {
      ev_ref (EV_AX);
    }

    void unref () throw ()
    {
      ev_unref (EV_AX);
    }

    void set_io_collect_interval (tstamp interval) throw ()
    {
      ev_set_io_collect_interval (EV_AX_ interval);
    }

    void set_timeout_collect_interval (tstamp interval) throw ()
    {
      ev_set_timeout_collect_interval (EV_AX_ interval);
    }

    // function callback
    void once (int fd, int events, tstamp timeout, void (*cb)(int, void *), void* arg = 0) throw ()
    {
      ev_once (EV_AX_ fd, events, timeout, cb, arg);
    }

    // method callback
    template<class K, void (K::*method)(int)>
    void once (int fd, int events, tstamp timeout, K *object) throw ()
    {
      once (fd, events, timeout, method_thunk<K, method>, object);
    }

    template<class K, void (K::*method)(int)>
    static void method_thunk (int revents, void* arg)
    {
      K *obj = static_cast<K *>(arg);
      (obj->*method) (revents);
    }

    // const method callback
    template<class K, void (K::*method)(int) const>
    void once (int fd, int events, tstamp timeout, const K *object) throw ()
    {
      once (fd, events, timeout, const_method_thunk<K, method>, object);
    }

    template<class K, void (K::*method)(int) const>
    static void const_method_thunk (int revents, void* arg)
    {
      K *obj = static_cast<K *>(arg);
      (obj->*method) (revents);
    }

    // simple method callback
    template<class K, void (K::*method)()>
    void once (int fd, int events, tstamp timeout, K *object) throw ()
    {
      once (fd, events, timeout, method_noargs_thunk<K, method>, object);
    }

    template<class K, void (K::*method)()>
    static void method_noargs_thunk (int revents, void* arg)
    {
      K *obj = static_cast<K *>(arg);
      (obj->*method) ();
    }

    // simpler function callback
    template<void (*cb)(int)>
    void once (int fd, int events, tstamp timeout) throw ()
    {
      once (fd, events, timeout, simpler_func_thunk<cb>);
    }

    template<void (*cb)(int)>
    static void simpler_func_thunk (int revents, void* arg)
    {
      (*cb) (revents);
    }

    // simplest function callback
    template<void (*cb)()>
    void once (int fd, int events, tstamp timeout) throw ()
    {
      once (fd, events, timeout, simplest_func_thunk<cb>);
    }

    template<void (*cb)()>
    static void simplest_func_thunk (int revents, void* arg)
    {
      (*cb) ();
    }

    void feed_fd_event (int fd, int revents) throw ()
    {
      ev_feed_fd_event (EV_AX_ fd, revents);
    }

    void feed_signal_event (int signum) throw ()
    {
      ev_feed_signal_event (EV_AX_ signum);
    }

#if EV_MULTIPLICITY
    struct ev_loop* EV_AX;
#endif

  };

#if EV_MULTIPLICITY
  struct dynamic_loop: loop_ref
  {

    dynamic_loop (unsigned int flags = AUTO) EV_THROW (bad_loop)
      : loop_ref (ev_loop_new (flags))
    {
    }

    ~dynamic_loop () throw ()
    {
      ev_loop_destroy (EV_AX);
      EV_AX = 0;
    }

  private:

    dynamic_loop (const dynamic_loop &);

    dynamic_loop & operator= (const dynamic_loop &);

  };
#endif

  struct default_loop: loop_ref
  {

    default_loop (unsigned int flags = AUTO) EV_THROW (bad_loop)
#if EV_MULTIPLICITY
      : loop_ref (ev_default_loop (flags))
    {
    }
#else
    {
    #if EV_CXX_EXCEPTIONS
      int r =
    #endif
          ev_default_loop (flags);
    #if EV_CXX_EXCEPTIONS
      if (!r)
        throw bad_loop ();
    #endif
    }
#endif

    ~default_loop () throw ()
    {
      ev_default_destroy ();
#if EV_MULTIPLICITY
      EV_AX = 0;
#endif
    }

  private:

    default_loop (const default_loop &);

    default_loop & operator= (const default_loop &);

  };

  inline loop_ref get_default_loop () throw ()
  {
#if EV_MULTIPLICITY
    return ev_default_loop (0);
#else
    return loop_ref ();
#endif
  }

#undef EV_AX
#undef EV_AX_

#undef EV_PX
#undef EV_PX_
#if EV_MULTIPLICITY
#  define EV_PX  loop_ref EV_A
#  define EV_PX_ loop_ref EV_A_
#else
#  define EV_PX
#  define EV_PX_
#endif

  template<class ev_watcher, class watcher>
  struct base : ev_watcher
  {
    #if EV_MULTIPLICITY
      EV_PX;

      void set (EV_PX) throw ()
      {
        this->EV_A = EV_A;
      }
    #endif

    base (EV_PX) throw ()
    #if EV_MULTIPLICITY
      : EV_A (EV_A)
    #endif
    {
      ev_init (this, 0);
    }

    void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) throw ()
    {
      this->data = data;
      ev_set_cb (static_cast<ev_watcher *>(this), cb);
    }

    // method callback
    template<class K, void (K::*method)(watcher &w, int)>
    void set (K *object) throw ()
    {
      set_ (object, method_thunk<K, method>);
    }

    template<class K, void (K::*method)(watcher &w, int)>
    static void method_thunk (EV_P_ ev_watcher *w, int revents)
    {
      K *obj = static_cast<K *>(w->data);
      (obj->*method) (*static_cast<watcher *>(w), revents);
    }

    // const method callback
    template<class K, void (K::*method)(watcher &w, int) const>
    void set (const K *object) throw ()
    {
      set_ (object, const_method_thunk<K, method>);
    }

    template<class K, void (K::*method)(watcher &w, int) const>
    static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
    {
      K *obj = static_cast<K *>(w->data);
      (static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents);
    }

    // function callback
    template<void (*function)(watcher &w, int)>
    void set (void *data = 0) throw ()
    {
      set_ (data, function_thunk<function>);
    }

    template<void (*function)(watcher &w, int)>
    static void function_thunk (EV_P_ ev_watcher *w, int revents)
    {
      function (*static_cast<watcher *>(w), revents);
    }

    // simple callback
    template<class K, void (K::*method)()>
    void set (K *object) throw ()
    {
      set_ (object, method_noargs_thunk<K, method>);
    }

    template<class K, void (K::*method)()>
    static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
    {
      K *obj = static_cast<K *>(w->data);
      (obj->*method) ();
    }

    void operator ()(int events = EV_UNDEF)
    {
      return ev_cb (static_cast<ev_watcher *>(this))
        (static_cast<ev_watcher *>(this), events);
    }

    bool is_active () const throw ()
    {
      return ev_is_active (static_cast<const ev_watcher *>(this));
    }

    bool is_pending () const throw ()
    {
      return ev_is_pending (static_cast<const ev_watcher *>(this));
    }

    void feed_event (int revents) throw ()
    {
      ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
    }
  };

  inline tstamp now () throw ()
  {
    return ev_time ();
  }

  inline void delay (tstamp interval) throw ()
  {
    ev_sleep (interval);
  }

  inline int version_major () throw ()
  {
    return ev_version_major ();
  }

  inline int version_minor () throw ()
  {
    return ev_version_minor ();
  }

  inline unsigned int supported_backends () throw ()
  {
    return ev_supported_backends ();
  }

  inline unsigned int recommended_backends () throw ()
  {
    return ev_recommended_backends ();
  }

  inline unsigned int embeddable_backends () throw ()
  {
    return ev_embeddable_backends ();
  }

  inline void set_allocator (void *(*cb)(void *ptr, long size)) throw ()
  {
    ev_set_allocator (cb);
  }

  inline void set_syserr_cb (void (*cb)(const char *msg)) throw ()
  {
    ev_set_syserr_cb (cb);
  }

  #if EV_MULTIPLICITY
    #define EV_CONSTRUCT(cppstem,cstem)                                                 \
      (EV_PX = get_default_loop ()) throw ()                                         \
        : base<ev_ ## cstem, cppstem> (EV_A)                                            \
      {                                                                                 \
      }
  #else
    #define EV_CONSTRUCT(cppstem,cstem)                                                 \
      () throw ()                                                                    \
      {                                                                                 \
      }
  #endif

  /* using a template here would require quite a bit more lines,
   * so a macro solution was chosen */
  #define EV_BEGIN_WATCHER(cppstem,cstem)                                               \
                                                                                        \
  struct cppstem : base<ev_ ## cstem, cppstem>                                          \
  {                                                                                     \
    void start () throw ()                                                           \
    {                                                                                   \
      ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this));                 \
    }                                                                                   \
                                                                                        \
    void stop () throw ()                                                            \
    {                                                                                   \
      ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this));                  \
    }                                                                                   \
                                                                                        \
    cppstem EV_CONSTRUCT(cppstem,cstem)                                                 \
                                                                                        \
    ~cppstem () throw ()                                                             \
    {                                                                                   \
      stop ();                                                                          \
    }                                                                                   \
                                                                                        \
    using base<ev_ ## cstem, cppstem>::set;                                             \
                                                                                        \
  private:                                                                              \
                                                                                        \
    cppstem (const cppstem &o);                                                         \
                                                                                        \
    cppstem & operator =(const cppstem &o);                                             \
                                                                                        \
  public:

  #define EV_END_WATCHER(cppstem,cstem)                                                 \
  };

  EV_BEGIN_WATCHER (io, io)
    void set (int fd, int events) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_io_set (static_cast<ev_io *>(this), fd, events);
      if (active) start ();
    }

    void set (int events) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_io_set (static_cast<ev_io *>(this), fd, events);
      if (active) start ();
    }

    void start (int fd, int events) throw ()
    {
      set (fd, events);
      start ();
    }
  EV_END_WATCHER (io, io)

  EV_BEGIN_WATCHER (timer, timer)
    void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
      if (active) start ();
    }

    void start (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
    {
      set (after, repeat);
      start ();
    }

    void again () throw ()
    {
      ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
    }
  EV_END_WATCHER (timer, timer)

  #if EV_PERIODIC_ENABLE
  EV_BEGIN_WATCHER (periodic, periodic)
    void set (ev_tstamp at, ev_tstamp interval = 0.) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
      if (active) start ();
    }

    void start (ev_tstamp at, ev_tstamp interval = 0.) throw ()
    {
      set (at, interval);
      start ();
    }

    void again () throw ()
    {
      ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
    }
  EV_END_WATCHER (periodic, periodic)
  #endif

  EV_BEGIN_WATCHER (sig, signal)
    void set (int signum) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_signal_set (static_cast<ev_signal *>(this), signum);
      if (active) start ();
    }

    void start (int signum) throw ()
    {
      set (signum);
      start ();
    }
  EV_END_WATCHER (sig, signal)

  EV_BEGIN_WATCHER (child, child)
    void set (int pid) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_child_set (static_cast<ev_child *>(this), pid);
      if (active) start ();
    }

    void start (int pid) throw ()
    {
      set (pid);
      start ();
    }
  EV_END_WATCHER (child, child)

  #if EV_STAT_ENABLE
  EV_BEGIN_WATCHER (stat, stat)
    void set (const char *path, ev_tstamp interval = 0.) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_stat_set (static_cast<ev_stat *>(this), path, interval);
      if (active) start ();
    }

    void start (const char *path, ev_tstamp interval = 0.) throw ()
    {
      stop ();
      set (path, interval);
      start ();
    }

    void update () throw ()
    {
      ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
    }
  EV_END_WATCHER (stat, stat)
  #endif

  EV_BEGIN_WATCHER (idle, idle)
    void set () throw () { }
  EV_END_WATCHER (idle, idle)

  EV_BEGIN_WATCHER (prepare, prepare)
    void set () throw () { }
  EV_END_WATCHER (prepare, prepare)

  EV_BEGIN_WATCHER (check, check)
    void set () throw () { }
  EV_END_WATCHER (check, check)

  #if EV_EMBED_ENABLE
  EV_BEGIN_WATCHER (embed, embed)
    void start (struct ev_loop *embedded_loop) throw ()
    {
      stop ();
      ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
      start ();
    }

    void sweep ()
    {
      ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
    }
  EV_END_WATCHER (embed, embed)
  #endif

  #if EV_FORK_ENABLE
  EV_BEGIN_WATCHER (fork, fork)
    void set () throw () { }
  EV_END_WATCHER (fork, fork)
  #endif

  #undef EV_PX
  #undef EV_PX_
  #undef EV_CONSTRUCT
  #undef EV_BEGIN_WATCHER
  #undef EV_END_WATCHER

}

#undef EV_THROW

#endif

Revision:	1.31
Committed:	Sat Jan 19 00:39:38 2008 UTC (16 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.30:	+79 -77 lines
Log Message:	throw declarations are fine any time
#	Content
1	/*
2	* libev simple C++ wrapper classes
3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.
6	*
7	* Redistribution and use in source and binary forms, with or without modifica-
8	* tion, are permitted provided that the following conditions are met:
9	*
10	* 1. Redistributions of source code must retain the above copyright notice,
11	* this list of conditions and the following disclaimer.
12	*
13	* 2. Redistributions in binary form must reproduce the above copyright
14	* notice, this list of conditions and the following disclaimer in the
15	* documentation and/or other materials provided with the distribution.
16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26	* OF THE POSSIBILITY OF SUCH DAMAGE.
27	*
28	* Alternatively, the contents of this file may be used under the terms of
29	* the GNU General Public License ("GPL") version 2 or any later version,
30	* in which case the provisions of the GPL are applicable instead of
31	* the above. If you wish to allow the use of your version of this file
32	* only under the terms of the GPL and not to allow others to use your
33	* version of this file under the BSD license, indicate your decision
34	* by deleting the provisions above and replace them with the notice
35	* and other provisions required by the GPL. If you do not delete the
36	* provisions above, a recipient may use your version of this file under
37	* either the BSD or the GPL.
38	*/
39
40	#ifndef EVPP_H__
41	#define EVPP_H__
42
43	#ifdef EV_H
44	# include EV_H
45	#else
46	# include "ev.h"
47	#endif
48
49	#ifndef EV_CXX_EXCEPTIONS
50	#define EV_CXX_EXCEPTIONS 1
51	#endif
52
53	#undef EV_THROW
54	#if EV_CXX_EXCEPTIONS
55	# include <stdexcept>
56	# define EV_THROW(exception) throw (exception)
57	#else
58	# define EV_THROW(exception)
59	#endif
60
61	namespace ev {
62
63	typedef ev_tstamp tstamp;
64
65	enum {
66	UNDEF = EV_UNDEF,
67	NONE = EV_NONE,
68	READ = EV_READ,
69	WRITE = EV_WRITE,
70	TIMEOUT = EV_TIMEOUT,
71	PERIODIC = EV_PERIODIC,
72	SIGNAL = EV_SIGNAL,
73	CHILD = EV_CHILD,
74	STAT = EV_STAT,
75	IDLE = EV_IDLE,
76	CHECK = EV_CHECK,
77	PREPARE = EV_PREPARE,
78	FORK = EV_FORK,
79	EMBED = EV_EMBED,
80	ERROR = EV_ERROR,
81	};
82
83	enum
84	{
85	AUTO = EVFLAG_AUTO,
86	NOENV = EVFLAG_NOENV,
87	FORKCHECK = EVFLAG_FORKCHECK,
88	SELECT = EVBACKEND_SELECT,
89	POLL = EVBACKEND_POLL,
90	EPOLL = EVBACKEND_EPOLL,
91	KQUEUE = EVBACKEND_KQUEUE,
92	DEVPOLL = EVBACKEND_DEVPOLL,
93	PORT = EVBACKEND_PORT
94	};
95
96	enum
97	{
98	NONBLOCK = EVLOOP_NONBLOCK,
99	ONESHOT = EVLOOP_ONESHOT
100	};
101
102	enum how_t
103	{
104	ONE = EVUNLOOP_ONE,
105	ALL = EVUNLOOP_ALL
106	};
107
108	#if EV_CXX_EXCEPTIONS
109	struct bad_loop : std::runtime_error
110	{
111	bad_loop ()
112	: std::runtime_error ("loop can't be initialized")
113	{
114	}
115	};
116	#endif
117
118	#ifdef EV_AX
119	# undef EV_AX
120	#endif
121
122	#ifdef EV_AX_
123	# undef EV_AX_
124	#endif
125
126	#if EV_MULTIPLICITY
127	# define EV_AX raw_loop
128	# define EV_AX_ raw_loop,
129	#else
130	# define EV_AX
131	# define EV_AX_
132	#endif
133
134	struct loop_ref
135	{
136
137	loop_ref (EV_P)
138	#if EV_MULTIPLICITY
139	EV_THROW (bad_loop) : EV_AX (EV_A)
140	#endif
141	{
142	#if EV_MULTIPLICIY && EV_CXX_EXCEPTIONS
143	if (!EV_A)
144	throw bad_loop ();
145	#endif
146	}
147
148	bool operator== (const loop_ref &other) const throw ()
149	{
150	#if EV_MULTIPLICITY
151	return this->EV_AX == other.EV_AX;
152	#else
153	return true;
154	#endif
155	}
156
157	bool operator!= (const loop_ref &other) const throw ()
158	{
159	#if EV_MULTIPLICITY
160	return ! (*this == other);
161	#else
162	return false;
163	#endif
164	}
165
166	#if EV_MULTIPLICITY
167	bool operator== (struct ev_loop *other) const throw ()
168	{
169	return this->EV_AX == other;
170	}
171
172	bool operator!= (struct ev_loop *other) const throw ()
173	{
174	return ! (*this == other);
175	}
176
177	bool operator== (const struct ev_loop *other) const throw ()
178	{
179	return this->EV_AX == other;
180	}
181
182	bool operator!= (const struct ev_loop *other) const throw ()
183	{
184	return (*this == other);
185	}
186
187	operator struct ev_loop * () const throw ()
188	{
189	return EV_AX;
190	}
191
192	operator const struct ev_loop * () const throw ()
193	{
194	return EV_AX;
195	}
196
197	bool is_default () const throw ()
198	{
199	return EV_AX == ev_default_loop (0);
200	}
201	#endif
202
203	void loop (int flags = 0)
204	{
205	ev_loop (EV_AX_ flags);
206	}
207
208	void unloop (how_t how = ONE) throw ()
209	{
210	ev_unloop (EV_AX_ how);
211	}
212
213	void post_fork () throw ()
214	{
215	#if EV_MULTIPLICITY
216	ev_loop_fork (EV_AX);
217	#else
218	ev_default_fork ();
219	#endif
220	}
221
222	unsigned int count () const throw ()
223	{
224	return ev_loop_count (EV_AX);
225	}
226
227	unsigned int backend () const throw ()
228	{
229	return ev_backend (EV_AX);
230	}
231
232	tstamp now () const throw ()
233	{
234	return ev_now (EV_AX);
235	}
236
237	void ref () throw ()
238	{
239	ev_ref (EV_AX);
240	}
241
242	void unref () throw ()
243	{
244	ev_unref (EV_AX);
245	}
246
247	void set_io_collect_interval (tstamp interval) throw ()
248	{
249	ev_set_io_collect_interval (EV_AX_ interval);
250	}
251
252	void set_timeout_collect_interval (tstamp interval) throw ()
253	{
254	ev_set_timeout_collect_interval (EV_AX_ interval);
255	}
256
257	// function callback
258	void once (int fd, int events, tstamp timeout, void (cb)(int, void ), void* arg = 0) throw ()
259	{
260	ev_once (EV_AX_ fd, events, timeout, cb, arg);
261	}
262
263	// method callback
264	template<class K, void (K::*method)(int)>
265	void once (int fd, int events, tstamp timeout, K *object) throw ()
266	{
267	once (fd, events, timeout, method_thunk<K, method>, object);
268	}
269
270	template<class K, void (K::*method)(int)>
271	static void method_thunk (int revents, void* arg)
272	{
273	K obj = static_cast<K >(arg);
274	(obj->*method) (revents);
275	}
276
277	// const method callback
278	template<class K, void (K::*method)(int) const>
279	void once (int fd, int events, tstamp timeout, const K *object) throw ()
280	{
281	once (fd, events, timeout, const_method_thunk<K, method>, object);
282	}
283
284	template<class K, void (K::*method)(int) const>
285	static void const_method_thunk (int revents, void* arg)
286	{
287	K obj = static_cast<K >(arg);
288	(obj->*method) (revents);
289	}
290
291	// simple method callback
292	template<class K, void (K::*method)()>
293	void once (int fd, int events, tstamp timeout, K *object) throw ()
294	{
295	once (fd, events, timeout, method_noargs_thunk<K, method>, object);
296	}
297
298	template<class K, void (K::*method)()>
299	static void method_noargs_thunk (int revents, void* arg)
300	{
301	K obj = static_cast<K >(arg);
302	(obj->*method) ();
303	}
304
305	// simpler function callback
306	template<void (*cb)(int)>
307	void once (int fd, int events, tstamp timeout) throw ()
308	{
309	once (fd, events, timeout, simpler_func_thunk<cb>);
310	}
311
312	template<void (*cb)(int)>
313	static void simpler_func_thunk (int revents, void* arg)
314	{
315	(*cb) (revents);
316	}
317
318	// simplest function callback
319	template<void (*cb)()>
320	void once (int fd, int events, tstamp timeout) throw ()
321	{
322	once (fd, events, timeout, simplest_func_thunk<cb>);
323	}
324
325	template<void (*cb)()>
326	static void simplest_func_thunk (int revents, void* arg)
327	{
328	(*cb) ();
329	}
330
331	void feed_fd_event (int fd, int revents) throw ()
332	{
333	ev_feed_fd_event (EV_AX_ fd, revents);
334	}
335
336	void feed_signal_event (int signum) throw ()
337	{
338	ev_feed_signal_event (EV_AX_ signum);
339	}
340
341	#if EV_MULTIPLICITY
342	struct ev_loop* EV_AX;
343	#endif
344
345	};
346
347	#if EV_MULTIPLICITY
348	struct dynamic_loop: loop_ref
349	{
350
351	dynamic_loop (unsigned int flags = AUTO) EV_THROW (bad_loop)
352	: loop_ref (ev_loop_new (flags))
353	{
354	}
355
356	~dynamic_loop () throw ()
357	{
358	ev_loop_destroy (EV_AX);
359	EV_AX = 0;
360	}
361
362	private:
363
364	dynamic_loop (const dynamic_loop &);
365
366	dynamic_loop & operator= (const dynamic_loop &);
367
368	};
369	#endif
370
371	struct default_loop: loop_ref
372	{
373
374	default_loop (unsigned int flags = AUTO) EV_THROW (bad_loop)
375	#if EV_MULTIPLICITY
376	: loop_ref (ev_default_loop (flags))
377	{
378	}
379	#else
380	{
381	#if EV_CXX_EXCEPTIONS
382	int r =
383	#endif
384	ev_default_loop (flags);
385	#if EV_CXX_EXCEPTIONS
386	if (!r)
387	throw bad_loop ();
388	#endif
389	}
390	#endif
391
392	~default_loop () throw ()
393	{
394	ev_default_destroy ();
395	#if EV_MULTIPLICITY
396	EV_AX = 0;
397	#endif
398	}
399
400	private:
401
402	default_loop (const default_loop &);
403
404	default_loop & operator= (const default_loop &);
405
406	};
407
408	inline loop_ref get_default_loop () throw ()
409	{
410	#if EV_MULTIPLICITY
411	return ev_default_loop (0);
412	#else
413	return loop_ref ();
414	#endif
415	}
416
417	#undef EV_AX
418	#undef EV_AX_
419
420	#undef EV_PX
421	#undef EV_PX_
422	#if EV_MULTIPLICITY
423	# define EV_PX loop_ref EV_A
424	# define EV_PX_ loop_ref EV_A_
425	#else
426	# define EV_PX
427	# define EV_PX_
428	#endif
429
430	template<class ev_watcher, class watcher>
431	struct base : ev_watcher
432	{
433	#if EV_MULTIPLICITY
434	EV_PX;
435
436	void set (EV_PX) throw ()
437	{
438	this->EV_A = EV_A;
439	}
440	#endif
441
442	base (EV_PX) throw ()
443	#if EV_MULTIPLICITY
444	: EV_A (EV_A)
445	#endif
446	{
447	ev_init (this, 0);
448	}
449
450	void set_ (void data, void (cb)(EV_P_ ev_watcher *w, int revents)) throw ()
451	{
452	this->data = data;
453	ev_set_cb (static_cast<ev_watcher *>(this), cb);
454	}
455
456	// method callback
457	template<class K, void (K::*method)(watcher &w, int)>
458	void set (K *object) throw ()
459	{
460	set_ (object, method_thunk<K, method>);
461	}
462
463	template<class K, void (K::*method)(watcher &w, int)>
464	static void method_thunk (EV_P_ ev_watcher *w, int revents)
465	{
466	K obj = static_cast<K >(w->data);
467	(obj->method) (static_cast<watcher *>(w), revents);
468	}
469
470	// const method callback
471	template<class K, void (K::*method)(watcher &w, int) const>
472	void set (const K *object) throw ()
473	{
474	set_ (object, const_method_thunk<K, method>);
475	}
476
477	template<class K, void (K::*method)(watcher &w, int) const>
478	static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
479	{
480	K obj = static_cast<K >(w->data);
481	(static_cast<K >(w->data)->method) (static_cast<watcher >(w), revents);
482	}
483
484	// function callback
485	template<void (*function)(watcher &w, int)>
486	void set (void *data = 0) throw ()
487	{
488	set_ (data, function_thunk<function>);
489	}
490
491	template<void (*function)(watcher &w, int)>
492	static void function_thunk (EV_P_ ev_watcher *w, int revents)
493	{
494	function (static_cast<watcher >(w), revents);
495	}
496
497	// simple callback
498	template<class K, void (K::*method)()>
499	void set (K *object) throw ()
500	{
501	set_ (object, method_noargs_thunk<K, method>);
502	}
503
504	template<class K, void (K::*method)()>
505	static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
506	{
507	K obj = static_cast<K >(w->data);
508	(obj->*method) ();
509	}
510
511	void operator ()(int events = EV_UNDEF)
512	{
513	return ev_cb (static_cast<ev_watcher *>(this))
514	(static_cast<ev_watcher *>(this), events);
515	}
516
517	bool is_active () const throw ()
518	{
519	return ev_is_active (static_cast<const ev_watcher *>(this));
520	}
521
522	bool is_pending () const throw ()
523	{
524	return ev_is_pending (static_cast<const ev_watcher *>(this));
525	}
526
527	void feed_event (int revents) throw ()
528	{
529	ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
530	}
531	};
532
533	inline tstamp now () throw ()
534	{
535	return ev_time ();
536	}
537
538	inline void delay (tstamp interval) throw ()
539	{
540	ev_sleep (interval);
541	}
542
543	inline int version_major () throw ()
544	{
545	return ev_version_major ();
546	}
547
548	inline int version_minor () throw ()
549	{
550	return ev_version_minor ();
551	}
552
553	inline unsigned int supported_backends () throw ()
554	{
555	return ev_supported_backends ();
556	}
557
558	inline unsigned int recommended_backends () throw ()
559	{
560	return ev_recommended_backends ();
561	}
562
563	inline unsigned int embeddable_backends () throw ()
564	{
565	return ev_embeddable_backends ();
566	}
567
568	inline void set_allocator (void (cb)(void *ptr, long size)) throw ()
569	{
570	ev_set_allocator (cb);
571	}
572
573	inline void set_syserr_cb (void (cb)(const char msg)) throw ()
574	{
575	ev_set_syserr_cb (cb);
576	}
577
578	#if EV_MULTIPLICITY
579	#define EV_CONSTRUCT(cppstem,cstem) \
580	(EV_PX = get_default_loop ()) throw () \
581	: base<ev_ ## cstem, cppstem> (EV_A) \
582	{ \
583	}
584	#else
585	#define EV_CONSTRUCT(cppstem,cstem) \
586	() throw () \
587	{ \
588	}
589	#endif
590
591	/* using a template here would require quite a bit more lines,
592	* so a macro solution was chosen */
593	#define EV_BEGIN_WATCHER(cppstem,cstem) \
594	\
595	struct cppstem : base<ev_ ## cstem, cppstem> \
596	{ \
597	void start () throw () \
598	{ \
599	ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
600	} \
601	\
602	void stop () throw () \
603	{ \
604	ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
605	} \
606	\
607	cppstem EV_CONSTRUCT(cppstem,cstem) \
608	\
609	~cppstem () throw () \
610	{ \
611	stop (); \
612	} \
613	\
614	using base<ev_ ## cstem, cppstem>::set; \
615	\
616	private: \
617	\
618	cppstem (const cppstem &o); \
619	\
620	cppstem & operator =(const cppstem &o); \
621	\
622	public:
623
624	#define EV_END_WATCHER(cppstem,cstem) \
625	};
626
627	EV_BEGIN_WATCHER (io, io)
628	void set (int fd, int events) throw ()
629	{
630	int active = is_active ();
631	if (active) stop ();
632	ev_io_set (static_cast<ev_io *>(this), fd, events);
633	if (active) start ();
634	}
635
636	void set (int events) throw ()
637	{
638	int active = is_active ();
639	if (active) stop ();
640	ev_io_set (static_cast<ev_io *>(this), fd, events);
641	if (active) start ();
642	}
643
644	void start (int fd, int events) throw ()
645	{
646	set (fd, events);
647	start ();
648	}
649	EV_END_WATCHER (io, io)
650
651	EV_BEGIN_WATCHER (timer, timer)
652	void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
653	{
654	int active = is_active ();
655	if (active) stop ();
656	ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
657	if (active) start ();
658	}
659
660	void start (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
661	{
662	set (after, repeat);
663	start ();
664	}
665
666	void again () throw ()
667	{
668	ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
669	}
670	EV_END_WATCHER (timer, timer)
671
672	#if EV_PERIODIC_ENABLE
673	EV_BEGIN_WATCHER (periodic, periodic)
674	void set (ev_tstamp at, ev_tstamp interval = 0.) throw ()
675	{
676	int active = is_active ();
677	if (active) stop ();
678	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
679	if (active) start ();
680	}
681
682	void start (ev_tstamp at, ev_tstamp interval = 0.) throw ()
683	{
684	set (at, interval);
685	start ();
686	}
687
688	void again () throw ()
689	{
690	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
691	}
692	EV_END_WATCHER (periodic, periodic)
693	#endif
694
695	EV_BEGIN_WATCHER (sig, signal)
696	void set (int signum) throw ()
697	{
698	int active = is_active ();
699	if (active) stop ();
700	ev_signal_set (static_cast<ev_signal *>(this), signum);
701	if (active) start ();
702	}
703
704	void start (int signum) throw ()
705	{
706	set (signum);
707	start ();
708	}
709	EV_END_WATCHER (sig, signal)
710
711	EV_BEGIN_WATCHER (child, child)
712	void set (int pid) throw ()
713	{
714	int active = is_active ();
715	if (active) stop ();
716	ev_child_set (static_cast<ev_child *>(this), pid);
717	if (active) start ();
718	}
719
720	void start (int pid) throw ()
721	{
722	set (pid);
723	start ();
724	}
725	EV_END_WATCHER (child, child)
726
727	#if EV_STAT_ENABLE
728	EV_BEGIN_WATCHER (stat, stat)
729	void set (const char *path, ev_tstamp interval = 0.) throw ()
730	{
731	int active = is_active ();
732	if (active) stop ();
733	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
734	if (active) start ();
735	}
736
737	void start (const char *path, ev_tstamp interval = 0.) throw ()
738	{
739	stop ();
740	set (path, interval);
741	start ();
742	}
743
744	void update () throw ()
745	{
746	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
747	}
748	EV_END_WATCHER (stat, stat)
749	#endif
750
751	EV_BEGIN_WATCHER (idle, idle)
752	void set () throw () { }
753	EV_END_WATCHER (idle, idle)
754
755	EV_BEGIN_WATCHER (prepare, prepare)
756	void set () throw () { }
757	EV_END_WATCHER (prepare, prepare)
758
759	EV_BEGIN_WATCHER (check, check)
760	void set () throw () { }
761	EV_END_WATCHER (check, check)
762
763	#if EV_EMBED_ENABLE
764	EV_BEGIN_WATCHER (embed, embed)
765	void start (struct ev_loop *embedded_loop) throw ()
766	{
767	stop ();
768	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
769	start ();
770	}
771
772	void sweep ()
773	{
774	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
775	}
776	EV_END_WATCHER (embed, embed)
777	#endif
778
779	#if EV_FORK_ENABLE
780	EV_BEGIN_WATCHER (fork, fork)
781	void set () throw () { }
782	EV_END_WATCHER (fork, fork)
783	#endif
784
785	#undef EV_PX
786	#undef EV_PX_
787	#undef EV_CONSTRUCT
788	#undef EV_BEGIN_WATCHER
789	#undef EV_END_WATCHER
790
791	}
792
793	#undef EV_THROW
794
795	#endif
796